Pressure applying and release mechanism for wringers



PRESSURE APPLYING AND RELEASE MECHANISM FOR wRINGERs April 15, 1952 w. L. KAUFFMAN, II

5 Sheetsf-Sheet l Filed Dec.

INVENTOR. Wal/mf KW C f/mmw Filed Dec. 26, 1944 pril 15, 1952 W. l.. KAUFFMAN,1I 2,592,575

PRESSURE APPLYING AND RELEASE MECHANISM FOR WRINGERS 5 Sheets-Sheet 2 nl um INVENTOR. BY l PY] `15 1952 W. L. KAUFFMAME 2,592,575

PRESSURE APPLYING AND RELEASE MECHANISM FOR WRINGERS Filed DSC. 26, 1944 5 Sheets-Sheet 3 u) .lgVENTOR` BY am" IWW? ATTORN EY? April 15 1952 W.| KAUFFMAME 2,592,575

PRESSURE APPLYING AND RELEASE MECHANISM FOR WRINGERS Filed Dec. 26, 1944 5 Sheets-Sheet 4 INVENToR BY wan-M a( 1p ATTORNEYS# April 15, 1952 w. L. KAUFFMAN, u 2,592,575

PRESSURE APPLYING AND RELEASE MECHANISM EoE wRINGERs Filed nec. 2s, 1944 5 sheets-shea 5 aNvENTo'R ATTORNEY@ Patented Apr. 15, 1952 UNITED STATE-S PATENT," CFFICEI 2,592,575 PRESSURE APPLYINGANn RELEASE MECHANISM FOR WRINGERS Walter L. Kauffman, II, Erie, Pal,- assigxior to Lovell Manufacturing Company,- Erie, Pa., a corporation of Pennsylvania Application December 26, 1944, Serial N'o. 569,770

The present invention relates tov clothes wringers in which the roll pressure is applied through a: member hinged at one end of the rolls by a toggle having a spring link. In one forni of thel invention the toggle linksA are maintainedY at or nea-r the straightened position' and the roll pressure is' applied and released by pivoting the tog-V gle to change itsV linel of action and an intermediate pressure islobtained by holding th'etoggle in an intermediate' position'. Another feature is the use of the variable resistance to' compression ofY the rolls to compensate for variations in the roll pressure. Further-'objects andv advantages appear in the specification and claims.

In the accompanying drawings Fig. 1 is a sectional front elevation of avvringer`r embodying my invention; Fig. 2Y is aperspective of the pressure releas'emember; Fig.4 3 is a sectional view on line of Fig. 1; Fig. 4T is a# front elevation ofthe wringer head showing the relationv of thepressure" release member and the pressure' applying lever; Fig'. 5 is a sectional View on line 5 -5 of Fig. 3"; Fig. 6'V is a sectional front elevation of a.l modification; Fig. 7 is a' sectional View on line l-T of Fig. 6*; Fig. 8' is a front elevation of the wringer in tliek close'd position; Figi. 9'-is a front elevation in the open position; Figs. 110,- 121i l2; 13 and 14" are perspective views of the' roll pressure toggle; Fig'. 15 isaperspective view of the bracket connecitingl the roll pressure toggle toA the upper" frame member; Fig. 16 is a perspective viewv of the pressure releaselatch; and Figs. 17, I8, 19, 20 and 2l are diagrammatic views illustrating` the operation of the roll pressure toggle.

Referring to the drawings, there is shown a wringerhaving a head l' swingably mounted ona wringer post 2" and located in the desired position by means of index mechanism having an op- Grafing? handle 3. Nithin the Wri'ger Head is reversing' mechani'smdri'ven by a shaft 4- and"l controlled'by a handle' 5'.- Theseparts are of con` ventional construction. x

The Wringerv frame comprises a lower frame member 6 xed to the wringer head and an upper frame-member 1 hinged at 8 tothe wringerihead?. The lower frame member isA ofl channel section having a bottom Wall 93 tapering to a drain opening F" and havingY side'y stiles H and" vl la fixed between the` side WallsV and carrying lower roll bearings |"2. The upper' f-'rarne member is alsov of channel section and has at the center of the rolls' a bracket l3 carrying a pin A|14 pivoted to'an equalizer bar' l5. Atv the ends ofthe equalizerbar are side' Stiles Hi; and llictv xed tov the sidewalls f the upper'frame' member and slidably receiving 161 Claims. (Cl. 68;-263

upper rolll bear-ings l-l which are -heldin place' on the ends of" the' equalizer bar by straps f8. The side walls 1a of the upper' andlower frame members in the close position form a substantiall'y completeenclosureof the top and bottom of the' rolls and blend into the side walls of the Wringer' head as indicated in Fig.- 3. At the outer end. the frame members are provided withinterttin'g portions' |19 whichl hold the rolls in alignment notwithstanding any play' inthe hinge 8'.

The" roll pressure sapplied and released b'y a swinging movenieiitrof the upper frame member about the hinge 8. The distribution of pressure along the upper'ard lower rolls' 20 and 2l is rhodied by tilting of the equalizer barl |15.4 The rolls are driven tliru'gh' a ilex'ible coupling 22 connect-'- ing a: shaft 23 driven by the reversing mechanism andfthe'lower roll shaft 24'.vv

The roll pressure mechanism comprises a toggle having a; channel snapedlink 2-5 having sides 2 Si' and" 25115 xed to psY 2S and 25a journaled in earsv4 21 and Zla i'n'iegial`r with the Wrger head.

At the outer; endsthe links are connected by a' member 28j having ears 129iL pivoted onV pins 30 on the respective links. At the center of the member 28 is Xed a sleeve 3Iv slidably receivingA aY bolt 32 threaded into' sleeve 33'havng a head 34- carrying a pivotl pin' 35 pivoted between the side walls 36' of a bracket 31 fixed to the side stile I6. Surrounding the sleeves 3|,- 33 is4 acompression sprin'g'l 38 which, together with its associated parts.l comprises the other'linkl of the roll pressure toggle. Y

In the' pressure applying position shown in Fig. l, thecenters of the' pins' 26; 26a and 35 are arranged so` that the' force of the spring tends to pivot thelinl';` 25 in a countereclockfwise direction toward the pressure` releasing position. This movement is prevented by an emergency release latchV 3'9` having arnis- 4D, 40d pivoted on the wringer head beneath the link 25. The arm Wa is providedvvitli a tooth which engages ratchet teeth 4'2 the? side 2515 of the' link 2'5'. The emer-v gency release latch is provided with handles 4'3 which project from opposite sides of the wringer and is' biased into engagement with theA ratchet teeth (Eby a tension spring lll-. By a downward pressure on either ofthe hand-les d'3/1 the einer-- gevncy" release latch i'sio'ved; out of engagement with the ratchet teeth 412 and the toggle is movedy to the presse-re releasing position by theY com pression spring 381 In the released position theV link 25 restsl against the top wall Ma of thel Wringer" head which servesas a stopl and the pivot pins 30 are-slightly below a center line com' necting the hinge 8 and the pin 35. The force of the compression spring 38 accordingly exerts an upward pressure on the pin 35 which tends to pivot the upper frame member 1 away from the lower frame member 6 and slightly separate the upper and lower rolls. The upward pressure tending to separate the rolls is only slight because the stop 44a limits the effective moment arm of the spring 38.

The roll pressure is applied by a handle 45 pivoted on an index member 46 fixed to the pin 26a. The handle has spaced shoulders 41, 48 cooperating with a pointer 49 integral with the index member to provide a lost motion connection. The pressure is applied by rotating the handle 45 in a clockwise direction as viewed in Fig. 4 (counter-clockwise as viewed in Fig. 5). During this movement of the handle, the shoulder 41 engages the pointer 49 and turns the pin 26a and.

the link 25 xed thereto toward the pressure applying position. By stopping the handle when the pointer is at or slightly beyond the positions indicated as low, medium, and high, the toggle link 25 will be stopped in corresponding positions and held there by the ratchet 4 I, 42. When the handle is released in any of these positions, it falls by gravity to a substantially horizontal position against a stop 58 so that the operator will not be tempted to release the roll pressure by turning the handle.

In the high pressure `position illustrated in Fig. 1, the maximum roll pressure is applied since the compression spring 38 is nearly perpendicular to a center line connecting the hinge 8 and the pivot pin 35 and the maximum moment is applied to force the upper frame member toward the lower frame member. In the intermediate positions corresponding to low and medium pressure, the toggle link is positioned at an acute angle to the center line connecting'theY hinge and the pivot pin 35 and, although the pressure exerted by the spring 38 on the pin 35 is substantially the same, the moment arm oi the spring force about the hinge 8 is less. In this construction the roll pressure is applied and released by changing the line of action of a pressure applying toggle having as one of its members a spring link which applies a substantially constant force but a variable moment to the upper roll frame. l

It will be noted that the forceV exerted by the spring-38 is a maximum when the toggle link 25 is in the maximum pressure position illustrated in Fig. 1 and is a minimum when the toggle link is in the pressure released position. y The difference in spring force is due to the distance between the centers of the pins 26, 26a and the pin 35. This distance is exaggerated in the drawing for the purpose of illustration. In actual practice this distance would be very small and the spring force would be substantially constant in all positions of the toggle. The work required to develop the full roll pressure is equal to the friction in the pivot pins of the toggle and the additional work required to slightly compress the spring 38 as it is moved from the pressure released to the pressure applying position. By properly designing the bearing surfaces for the toggle pivot pins and by closely spacing the centers of the pins 26, 26a and the center of the pin 35, the force required to develop the roll pressure can be kept to a veryv small value.

The modication shown in'Figs. 6 to 16 inelusive diiers from the previously described construction primarily in the design of the pressure applying toggle. In the previously described construction, the pressure applying toggle could be described as unstable in that the force exerted by the spring 38 on the toggle link 25 at all times tends to pivot the toggle link 25 toward the pressure released position. To apply the roll pressure it is therefore necessary to manually move the toggle links toward the pressure applying position while the pressure may be released by merely tripping a latch. In the modification shown, the toggle can be described `as stable in that the pressure exerted by the spring link tends to pivot the toggle toward the pressure applying position. With a stable toggle it is obviously necessary that the toggle be manually moved toward the pressure released position.

As in the previously described construction, the wringer has a head 5| having a depending sleeve 52 rotatably received in the upper end of a wringer post 53. The head is indexed in the desired position by an index pin 54 which cooperates with suitably spaced holes 55 in a collar 56 at the upper end of the wringer post. Within the wringer head are reversing gears 51 which continually mesh with a pinion 58 at the upper end of a driving shaft 59. The gears 51 are loose on a shaft 88 on which is splined a clutch member 6| having clutch teeth 52 which are movable from the neutral position shown into engagement with either one or the other of the gears 51. On the hub of one of the gears 51 is a gear 63 meshing with a gear 64 on a drive shaft 55 connected by a coupling 66 to the lower roll shaft 61. The lower roll 58 is carried in bearings 89 in side stiles 10, 18a at opposite ends of a lower frame member 1|. The upper roll 12 is carried in bearings 13 slidably received in side stiles 14, 14a fixed to the upper frame member The upper roll bearings are held by straps 18 at opposite ends of an equalizer bar 11 pivoted at its center on a pin 18 carried by a bracket 19 xed to the upper frame member. The upper frame member is hinged at to the top of the head. These parts are substantially identical with the previously described wringer.

The roll pressure mechanism comprises a toggle having a channel shaped link 8| having sides 82 and 83 pivoted on pins 84 and 85 in ears 86 on the wringer head. Between the upper ends of the link 8| is a member 81 having ears 88 pivoted on pins 89. At the center of the member 81 is a clearance opening 90 for a bolt 9| having its lower end threaded into a projection 92 on a member 93 pivoted on a pin 94 xed between sides 'on a bracket 98 fixed to the side stile 14 on the upper frame member. Between the members 81 and 93 is a compression spring 91 which forms the other link of the roll pressure applying toggle. It will be noted from Figs. 6 and '7 that in the pressure applying position of the toggle the centers of the pins 84 and 85 are slightly above the center of the pin 94. As the toggle is moved to the pressure releasing position in which the toggle link 8| rests on the top of the wringer head and its free end is slightly below a center line connecting the pivots 80, 84, the spring 91 is slightly compressed. In the pressure released position the line of action of the force exerted by the spring 91 tends to pivot the upper frame member 15 away from the lower frame member so that the upper and lower rolls are slightly separated. In this position the upper frame member may be lifted (Fig. 9) so as to permit inspection or cleaning of the rolls. In

one of the stops 98 corresponding to the desiredroll pressure. When the upper frame member reaches a positionA inwhich the upper roll is just short of contact with the lower roll, the pin 94 is slightly below a center line connecting the hinge 804 and the centers of the pins 84, 85 andtheforce exerted by the spring 91 on the toggle link 8|A `tends to pivot th-etoggle link in a clockwise direction to a position limited by the stop 98 which thev operator has depressed. As in the previously described construction the stops 99determine the angular position of the toggleand thereby determine the pressure moment tendingto force the upper frame member toward the lower frame member;

In' the pressure applying position the toggle is held against counter-clockwise movement by a pawl 99 which is held by a tension spring |00 against ratchet teeth in the toggle link 8|. This ratchet is necessary because with close spacing of the centers of the pins 64, 85 and 94 as is desirable to' obtain ease of operation, the center of the pin 94 will move above the centers` of the pins 84, 85 as the rolls separate' during wringing and the force exerted by the spring 91 on the toggle link 8| will then tend to pivot the` toggle toward the pressure released position. The pressure is released by a lever |02 fixed to the pin 84 to which there is also pinned an arm |03 having a projection |04 cooperating with they pawl 99 and aprojection |05 cooperating with the side 82 of the toggle link 8|.` In the pressure applying position-the projection |05 is slightly spaced from the toggle link 8| and the projection |04 rests against the upper surface of the pawl 99. The tension of the spring |00 is sufficient to maintain the handle |02 in an upright position. Upon rotation of the handle |012 in a counter-clockwise direction (Fig. 8), the initial movement causes a depression of the pawl 99 to move it clear. of` the ratchet teeth |0-|. If the wringer rolls are separated as would be the case under normal operation, the center of the pin 94 will be above the centers of the pins 84, 85 and the pressure of the spring 91- will` move the toggle toward the released position. If the wringer rolls are not separated, upon further counter-clockwise movement of the handle |02, the projection |05 engages the link 8l and forcibly moves it to the pressure releasedposition. As the link 8| approaches the top of the wringer head the roll pressure due to the spring 91 approaches zero permitting an upward movement of the topV frame du'e to relief of the compression of the rolls. When the link 8| reaches the top of the wringer head, the free end of the link 8| is not only below the center lineY connecting the pivots 80, 84 but is also below a center line connecting pivots 80, 94 as described above, and the force exerted by the spring 91 tends to pivot the upper frame member away from the lower frame member.

The operation of the pressure applying toggle for the wringer illustrated in Figs. 6 to 16 inclusive,. is diagrammatically illustrated in Figs. 17 to 21. It will be understood that similar diagrams could be prepared for the pressure applyingi toggle of the other wringer. In'the position toggle link 8| will? be;

illustrated in Fig L75, the upper' framemember 15' hasl been lifted t'o permit inspection or cleaning of! the wringer rolls and the togglef spring 91' is expanded toA the limit permitted by the' bolt 92|.-

To apply'y the roll pressure; the upper frame member'is manually moved through theiposition shown in Fig. 19in which' the center of: the pin 94 moves into substar'itial coincidencev with' thecenters of theV pins 84 and 85 to' the position shown in Fig. 20, in which the pin 94d is slightly' below the pins 84, 8'5. In this position it" is o'bvious that the spring' 91 exerts a force on the" toggle link v3|v tending to pivot it in a; clockwise direction toward' thepositionv shown in Fig. 2l. In the position shown in Fig. 21",. which is' the maximum pressure position, the link 8| is stopped: short of a center line connecting the pins 84 and 9'4 so that the spring' 91 tends. to hold' thelink! in this position. During wringing the material fed between the rolls forces the upper rollaway from the lower roll and moves the pivot pin 94r in an arc about the hinge 80. At a rollsep'aration determined by the spacing` of the pins 84 and 94V and by the angle of the toggle link 8| with respect to the -center line of the pins,` the direction of the force exerted on the toggle linkY 8l by the spring 91 reverses and tends to move the toggle link toward the pressure releasing position. If the ratchet 99, ||l| is omitted', the roll. pressure will release at this roll separation whichv may be a desirable characteristic for-some applications.

By stopping the link 8| at a position intermediate that shown in Figs. 20 and 21, an intermediate pressure will be applied to the rolls. the intermediate positions not only is the pres-:- sure decreased, but the' rate of increase of pressure with roll separation-is also descreased. This" isA advantageous in wringing multiple thicknessesy of Woolens which may be damaged by excessive pressure.

WhatfI claim as new is:

1. In a wringer, aframe, spaced pi'votson the frame, a roll pressure member hinged 4at one of" said pivots, a link hinged atthe other p'ivotlfo'rswinging movementrfrom a` position along to aposition transverse to the center line ofthe pivots, a spring connected at one end to the free end of the link and extending awayfrom. the free end of the link and toward'theother pivot, anda` part on' the pressure member spaced fromA the pivot on which the pressure member is hingedv and connected to the other end of the spring whereby the rol1 pressure is dependent upon the position of the link with reference to the center line.

2. In a wringer, a frame for receiving apai'r of pressure rolls comprising a lower frame member and an upper frame member hinged thereto at oneend for movement in the plane of the rolls, roll carrying provisions in said members, a link pivoted on the lower frame at ya point spaced from the hinge pivot for swinging movement on opposite sides of a center line connecting. the pivots, the free end of the link lying below` said center line in the pressure released position of the wringer, a spring` connected to the free end of thel link and-extending away from ther-ree endof the InV link and toward the link pivot and connected to the upper frame member at a point movable past the said center line by movement of the upper frame member toward the lower frame member whereby the link is moved by the spring to the pressure applying position above and transverse t said centerline, and means for moving the link below the pivot center line to eiect separation of the frame members.

3. In a wringer, a frame, spaced pivots on the frame, a roll pressure member hinged at one of said pivots for applying and releasing pressure by movement about its pivot, a link hinged at the other pivot for movement on either side of a center line connecting the pivots, and a spring connected at on-e end to the free end of the link and extending away from the free end of the link and toward said otherv pivot and connected to -said pressure member at a point spaced from the pivot on which the pressure member is hinged whereby the direction of the force exerted by the spring is variable by pivoting the link.

4. In a wringer structure having spaced pressure sustaining pivots, a roll pressure member hinged at one of said pivots for applying and releasing pressure by movement about its pivot, a link hinged at the other pivot for movement on either side of a center line connecting the pivots, a spring connected at one end to the free end of the link and extending away from the free end of the link and toward said other pivot and connected to said pressure member at a point spaced from the pivot on which the pressure member is hinged whereby the direction of the force exerted by the spring is variable by positioning the link, and a stop on one side of the center line for limiting the separating or releasing force on the pressure member.

5. In a wringer structure having spaced pressure sustaining pivots, a roll pressure member hinged at one of said pivots for applying and releasing pressure by movement about its pivot, a link hinged at the other pivot for movement on either side of a center line connecting the pivots, a spring connected at one end to the free end of the link and extending away from the free end of the link and toward said other pivot and connected to said pressure member whereby the direction of the force exerted by the spring is variable by positioning the link, a stop on one side of the center line for limiting the separating force on the pressure member, and an adjustlable stopV on the other side of the center line for limiting the closing force on the pressure member.

6. In a wringer structure having spaced pressure sustaining pivots, a roll pressure member hinged at one of said pivots for applying and releasing pressure by movement about its pivot, a link hinged at the other pivot for movement on either side of a center line connecting the pivots, a spring connected at one end to the free end of the link and extending away from the free end of the link and toward said other pivot and connected to said pressure member at a point spaced from the pivot on which the pressure member is hinged whereby the direction of the force exerted by the spring is variable by positioning the link, and a control for the position of the link whereby the roll pressure may be applied 01 released.

7. In a wringer, a frame, spaced pivots on the frame, a rollpressure member hinged at one of the pivots, a spring connected at one end to the pressure member at a point spaced from the pressure member pivot, a link connected to the other end of the spring and extending back along the spring to the other of the frame pivots, and means for positioning the link in a plurality of pressure positions while maintaining the spring and link in substantial alignment to vary the line of action of the spring on the pressure member.

8. In a wringer, a frame, spaced pivots on the frame, a roll pressure member hinged at one of said frame pivots and having a pivot thereon, a toggle comprising links hinged to each other and respectively to adjacent pivots, one of which is the other of the spaced pivots on the frame and the other of the adjacent pivots being the aforesaid pivot on the roll pressure member, one of the links including a spring sustaining pressure along the length of the link, and said links being swingable between a position along to a position transverse to the center line of the spaced pivots.

9. In a wringer, a frame, spaced pivots on the frame, a roll pressure member hinged at one of said pivots for applying and releasing pressure by movement about its pivot, a toggle having a link hinged at the other pivot and another link pivoted to the first link and extending away from its common pivot on the first link toward the other pivot and connected to the pressure member at a point spaced from the pivot on which the pressure member is hinged, one of said links comprising a spring and being swingable to different angular positions with reference to the center line of the spaced pivots to vary the force exerted by the toggle on the pressure member from pressure release to maximum pressure, and means on the member for holding the one link in an angular position intermediate the pressure release and maximum pressure positions.

10. In a wringer structure having spaced pressure sustaining pivots, a roll pressure member hinged at one of said pivots for applying and releasing pressure by movement about its pivot, a toggle having links hinged to each other and extending in the same general direction from the common hinge and connected respectively to said other pivot and an adjacent point on said member, one of said links including a spring, sustaining pressure along the length of the link, said toggle being swingable between maximum pressure and pressure release positions, and means for holding the toggle in a position intermediate the maximum and pressure release positions.

11. In a wringer. a lower frame, spaced pivots on the lower frame, an upper frame hinged at one end to one of the pivots on the lower frame and extending over the other pivot on the lower frame, a pivot on the upper frame adjacent the pivot on the lower frame in the pressure applying position, a roll pressure toggle comprising a pair of links pivoted to each other and extending toward adjacent pivots, one of which is the pivot on said upper frame and spaced from its hinge and the other of which is the other pivot on the lower frame, one of said toggle links including a spring and said toggle links being swingable between a pressure releasing position along a center line connecting the hinge and said other pivot and a pressure applying position transverse to the center line, said toggle link pivots being arranged so that as the upper frame is swung toward its normal operative position the spring link exerts a force moving the toggle toward the pressure applying position.

12. In a wringer, a frame, spaced pivots on the frame, a pressure member pivoted on one of the spaced pivots, a link pivoted on the other pivot and movable from a pressure releasing position along the center line of the pivots to a pressure applying position transverse to the center line, a pivot on the pressure member adj-acent the other pivot, a spring arranged between the free end of the link and the pivot and the pressure member, the spring and link pivot being arranged so the link and spring comprise a toggle in which the spring swings with the link between the pressure release and its pressure applying position and the spring in its pressure applying position approaches the center line of the link and spring pivots, and a latch for holding the link in pressure applying position.

13. In a wringer assembly, a roll pressure member, a frame sustaining the roll pressure, a pivot on the frame and another pivot on the member adjacent the rst pivot, roll pressure mechanism connected between said pivots comprising a link pivoted to one of the pivots and a spring substantially aligned with the link and extending' away from the free end of the link to the other of the pivots, said spring and link comprising a toggle in which the link is urged angularly about its pivot in a direction dependent upon its position relative to the center line of the link and spring pivots, and latch means to hold the link with respect to the frame in a plurality of angular positions of the toggle, said link and frame constituting parts of the assembly and said latch means comprising xed means on one of said parts and movable means on another of said parts for locking said parts together, one of said last two means having a plurality of elements cooperating with the other of the last two means to hold the parts in different adjusted positions for stopping the movement of the link in any selected one of a plurality of angular positions whereby the direction of the pressure exerted is variable.

14. In a wringer assembly, a frame, spaced pivots on the frame, a roll pressure member hinged on one of the frame pivots, a pivot on the roll pressure member spaced from its hinge, a toggle comprising links hinged to each other, one of which includes a spring sustaining pressure along its length, one of the links being pivoted to the other of the frame pivots and the other link extending from the common hinge back along the rst link to the pivot on the roll pressure member, said pivot on the roll pressure member being spaced from the other link pivot a distance substantially less than the length of either toggle link, and latch means to hold the link with respect to the frame in a plurality of angular positions of the toggle, said link and frame constituting parts of the assembly and said latch means comprising fix-ed means on one of said parts and movable means on another of said parts for locking said parts together, one of said last two means having a plurality of elements cooperating with the other of the last two means to hold the parts in different adjusted positions for restricting movement of the toggle to one side of the center line connecting the toggle link pivots and for holding the toggle in any selected one of a plurality of angular positions relative to said center line.

15. In a wringer assembly, a frame, spaced pivots on the frame, a roll pressure member hinged at one of said pivots for applying and releasing pressure by movement about its hinge, a pivot on the roll pressure member spaced from its hinge, pressure mechanism including a link pivoted to the other of the spaced frame pivots, a spring arranged between the free end of the link and extending away from the free end of the link back along the link to the pivot on the roll pressure member, said spring and link comprising a toggle, the toggle pivots being arranged so the spring tends to pivot the link toward the frame pivot on which the roll pressure member is hinged and thereby decrease the pressure on said member, and latch means to hold the link with respect to the frame in a plurality of angular positions of the toggle, said link and frame constituting parts of the assembly and said latch means comprising xed means on one of said parts and movable means on another of said parts for locking said parts together, one of said last two means having a plurality of elements cooperating with the other oi the last two means to hold the parts in different adjusted positions for retaining the links in the pressure applying position.

16. In a wringer assembly, a pair of wringer rolls, a frame, spaced pivots on the frame, a roll pressure member hinged at one of the spaced frame pivots for movement in the plane of said rolls, said roll pressure member having a pivot thereon spaced from its hinge, a toggle comprising links pivoted to each other and respectively pivoted to the other frame pivot and to the pivot on the roll pressure member, said toggle links extending in the same general direction from the common pivot, and the pivots for the free end of the toggle links being spaced from the roll pressure member hinge and being spaced apart a distance substantially less than the length of either toggle link, one of the toggle links including a spring sustaining pressure along its length, and said links being movable from a pressure releasing position along a center line connecting the hinge for the roll pressure member and the pivot on the roll pressure member to a pressure applying position transverse to said center line.

WALTER L. KAUFFMAN, II.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 468,446 Great Britain July 5, 1937 

